Recognised as Colour

#666C89

#666C89
Blue
Dark
Nearest: Slate grey

#666C89 is a blue with RGB values 102, 108, 137 and HSL 230°, 15%, 47%. It is a dark colour, so white text on it reaches 5.2:1 contrast (AA for normal text). The nearest named colour is Slate grey.

Colour values

#666C89#666C89

HEX#666C89

RGBrgb(102, 108, 137)

RGB (0–1)0.4, 0.4235, 0.5373

RGB percentages40%, 42.4%, 53.7%

HSLhsl(229.7, 14.6%, 46.9%)

HSV / HSBhsv(229.7, 25.5%, 53.7%)

CMYK25.5%, 21.2%, 0%, 46.3%≈naive device-independent conversion; real print needs an ICC profile

24-bit integer6,712,457

CSS custom property--colour: #666C89;

Brightness & contrast

Relative luminance0.15356WCAG 2.x, 0 is black and 1 is white

Perceived brightness110 of 255ITU-R BT.601 weighting

Light or darkDark

Best text colour on this backgroundWhitecontrast 5.16:1

Contrast with white5.16:1WCAG normal text: AA

Contrast with black4.07:1WCAG normal text: Fail

Greyscale equivalent#6D6D6D

Inverted#999376

Colour vision & accessibility

Normal vision Protanopia Deuteranopia Tritanopia

Protanopia#646F8Ano red cones; affects about 1% of men; ΔE 2.4 from the original

Deuteranopia#626C88no green cones; the most common form, about 1% of men; ΔE 1.6 from the original

Tritanopia#5D7176no blue cones; rare, and affects men and women equally; ΔE 15.7 from the original

Distinguishable without hueYesnever rely on hue alone to carry meaning

Contrast with white, large text5.16:1WCAG large text: AAA

Contrast with black, large text4.07:1WCAG large text: AA

Named colours

Slate grey · ΔE 11.3 Light slate grey · ΔE 13.2 Dim grey · ΔE 17.4 Gray · ΔE 18.8 Steel blue · ΔE 18.9 Dark slate grey · ΔE 25.6

Nearest named CSS colourSlate grey (#708090)ΔE 11.3, a distinctly different colour

Hue familyblue

CSS keyword usableNo exact keyword

Colour harmonies

base +30°+90°+120°+180°+210°+240°+270°+330°

Complementary#898366

Analogous#667D89, #726689

Triadic#89666C, #6C8966

Split complementary#897266, #7D8966

Tetradic#89667D, #898366, #668972

Tints, shades & saturation

+40%+30%+20%+10%base -10%-20%-30%-40%

Lighter +40%#D9DAE2

Lighter +30%#BBBECD

Lighter +20%#9EA2B7

Lighter +10%#8186A1

Darker −10%#50556C

Darker −20%#3A3E4F

Darker −30%#252731

Darker −40%#0F1014

More saturated +25%#4858A7

Less saturated −25%#777777

Channel breakdown

R102

G108

B137

Red102 (40%)

Green108 (42.4%)

Blue137 (53.7%)

Hue229.71°

Saturation (HSL)14.64%

Lightness46.86%

Dominant channelBlue

Hex per channelR 66 · G 6C · B 89

Keep nerding

Every link below is a page Nerdulator can generate from what it already knows about this value.

#666C89

Colour values

Brightness & contrast

Colour vision & accessibility

Named colours

Colour harmonies

Tints, shades & saturation

Channel breakdown

Keep nerding

Harmonies

Lighter and darker

Similar named colours

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